Quantum Dot Devices With Shaped Gates For Spatial Localization

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Solution Overview

Problem

Current quantum computing technologies face challenges in achieving strong spatial localization and control over quantum dots, scalability, and flexibility in electrical connections for quantum logic operations.

Innovation Solution

The development of quantum dot devices with a quantum well stack and gates having specific footprints, allowing for the formation of quantum dots as qubits and precise control over their interactions through voltage adjustments, enabling good spatial localization and scalability, and flexible electrical connections.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If quantum dots are formed using conventional methods, then quantum computing operations can be performed, but strong spatial localization and control over quantum dot interactions are not achieved

Engineering Contradiction:

Improvespatial localization precisionVSAvoidmanufacturing complexity

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The device is segmented into multiple quantum well stacks arranged in an array, with each stack containing quantum dots that can be independently controlled. This segmentation allows precise spatial localization of individual quantum dots while maintaining manufacturability through standardized array fabrication processes

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements local quality by providing individual gate electrodes over each quantum well stack, enabling independent voltage control of each quantum dot. This local control mechanism achieves precise spatial localization and interaction control without requiring complex global fabrication processes

Inventive Principle:

Principle #3Local quality

2Productivity

If quantum dot devices are designed for scalability, then more qubits can be integrated, but flexibility in electrical connections for quantum logic operations is reduced

Engineering Contradiction:

Improvequantum dot scalabilityVSAvoidelectrical connection flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The gate electrodes serve multiple functions: they control quantum dot formation, regulate particle interactions, and provide electrical connections for quantum logic operations. This multi-functionality enables scalability while maintaining connection flexibility, as the same structural elements fulfill both scaling and adaptability requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If conventional quantum computing devices are used, then quantum operations can be performed, but control over quantum dot interactions is insufficient

Engineering Contradiction:

Improvecontrol precisionVSAvoiddevice structure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent implements dynamic control through voltage-adjustable gate electrodes that can modulate quantum dot interactions in real-time. This dynamic control mechanism allows precise adjustment of interaction strength without requiring complex static structural modifications, achieving high control precision with relatively simple device architecture

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10644113B2Quantum dot array devices

Publication Date: 2020.05.05 INTEL CORP

AI summary

Disclosed herein are quantum dot devices, as well as related computing devices and methods. For example, in some embodiments, a quantum dot device may include: a quantum well stack including a quantum well layer; and a plurality of gates disposed above the quantum well stack, wherein individual ones of the plurality of gates have a footprint shape with two opposing linear faces and two opposing curved faces.